diff --git a/src/tools/run-make-support/src/assertion_helpers.rs b/src/tools/run-make-support/src/assertion_helpers.rs
index 5fb9d0da494..844c2d477aa 100644
--- a/src/tools/run-make-support/src/assertion_helpers.rs
+++ b/src/tools/run-make-support/src/assertion_helpers.rs
@@ -5,52 +5,6 @@
 
 use crate::fs as rfs;
 
-/// Gathers all files in the current working directory that have the extension `ext`, and counts
-/// the number of lines within that contain a match with the regex pattern `re`.
-pub fn count_regex_matches_in_files_with_extension(re: &regex::Regex, ext: &str) -> usize {
-    let fetched_files = shallow_find_files(cwd(), |path| has_extension(path, ext));
-
-    let mut count = 0;
-    for file in fetched_files {
-        let content = rfs::read_to_string(file);
-        count += content.lines().filter(|line| re.is_match(&line)).count();
-    }
-
-    count
-}
-
-/// Read the contents of a file that cannot simply be read by
-/// [`read_to_string`][crate::fs::read_to_string], due to invalid UTF-8 data, then assert
-/// that it contains `expected`.
-#[track_caller]
-pub fn invalid_utf8_contains<P: AsRef<Path>, S: AsRef<str>>(path: P, expected: S) {
-    let buffer = rfs::read(path.as_ref());
-    let expected = expected.as_ref();
-    if !String::from_utf8_lossy(&buffer).contains(expected) {
-        eprintln!("=== FILE CONTENTS (LOSSY) ===");
-        eprintln!("{}", String::from_utf8_lossy(&buffer));
-        eprintln!("=== SPECIFIED TEXT ===");
-        eprintln!("{}", expected);
-        panic!("specified text was not found in file");
-    }
-}
-
-/// Read the contents of a file that cannot simply be read by
-/// [`read_to_string`][crate::fs::read_to_string], due to invalid UTF-8 data, then assert
-/// that it does not contain `expected`.
-#[track_caller]
-pub fn invalid_utf8_not_contains<P: AsRef<Path>, S: AsRef<str>>(path: P, expected: S) {
-    let buffer = rfs::read(path.as_ref());
-    let expected = expected.as_ref();
-    if String::from_utf8_lossy(&buffer).contains(expected) {
-        eprintln!("=== FILE CONTENTS (LOSSY) ===");
-        eprintln!("{}", String::from_utf8_lossy(&buffer));
-        eprintln!("=== SPECIFIED TEXT ===");
-        eprintln!("{}", expected);
-        panic!("specified text was unexpectedly found in file");
-    }
-}
-
 /// Assert that `actual` is equal to `expected`.
 #[track_caller]
 pub fn assert_equals<A: AsRef<str>, E: AsRef<str>>(actual: A, expected: E) {
diff --git a/src/tools/run-make-support/src/lib.rs b/src/tools/run-make-support/src/lib.rs
index f97e3dd5d8b..3dbc2d201ff 100644
--- a/src/tools/run-make-support/src/lib.rs
+++ b/src/tools/run-make-support/src/lib.rs
@@ -16,6 +16,7 @@
 pub mod path_helpers;
 pub mod run;
 pub mod scoped_run;
+pub mod string;
 pub mod targets;
 
 // Re-exports of third-party library crates.
@@ -71,5 +72,8 @@
 
 pub use assertion_helpers::{
     assert_contains, assert_equals, assert_not_contains, assert_recursive_eq,
+};
+
+pub use string::{
     count_regex_matches_in_files_with_extension, invalid_utf8_contains, invalid_utf8_not_contains,
 };
diff --git a/src/tools/run-make-support/src/string.rs b/src/tools/run-make-support/src/string.rs
new file mode 100644
index 00000000000..f0b1e2334d8
--- /dev/null
+++ b/src/tools/run-make-support/src/string.rs
@@ -0,0 +1,50 @@
+use std::path::Path;
+
+use crate::fs as rfs;
+use crate::path_helpers::{cwd, has_extension, shallow_find_files};
+
+/// Gathers all files in the current working directory that have the extension `ext`, and counts
+/// the number of lines within that contain a match with the regex pattern `re`.
+pub fn count_regex_matches_in_files_with_extension(re: &regex::Regex, ext: &str) -> usize {
+    let fetched_files = shallow_find_files(cwd(), |path| has_extension(path, ext));
+
+    let mut count = 0;
+    for file in fetched_files {
+        let content = rfs::read_to_string(file);
+        count += content.lines().filter(|line| re.is_match(&line)).count();
+    }
+
+    count
+}
+
+/// Read the contents of a file that cannot simply be read by
+/// [`read_to_string`][crate::fs::read_to_string], due to invalid UTF-8 data, then assert
+/// that it contains `expected`.
+#[track_caller]
+pub fn invalid_utf8_contains<P: AsRef<Path>, S: AsRef<str>>(path: P, expected: S) {
+    let buffer = rfs::read(path.as_ref());
+    let expected = expected.as_ref();
+    if !String::from_utf8_lossy(&buffer).contains(expected) {
+        eprintln!("=== FILE CONTENTS (LOSSY) ===");
+        eprintln!("{}", String::from_utf8_lossy(&buffer));
+        eprintln!("=== SPECIFIED TEXT ===");
+        eprintln!("{}", expected);
+        panic!("specified text was not found in file");
+    }
+}
+
+/// Read the contents of a file that cannot simply be read by
+/// [`read_to_string`][crate::fs::read_to_string], due to invalid UTF-8 data, then assert
+/// that it does not contain `expected`.
+#[track_caller]
+pub fn invalid_utf8_not_contains<P: AsRef<Path>, S: AsRef<str>>(path: P, expected: S) {
+    let buffer = rfs::read(path.as_ref());
+    let expected = expected.as_ref();
+    if String::from_utf8_lossy(&buffer).contains(expected) {
+        eprintln!("=== FILE CONTENTS (LOSSY) ===");
+        eprintln!("{}", String::from_utf8_lossy(&buffer));
+        eprintln!("=== SPECIFIED TEXT ===");
+        eprintln!("{}", expected);
+        panic!("specified text was unexpectedly found in file");
+    }
+}